这是CSA C2的第一版。1、单相和三相充液配电变压器。它取代了1991年、1982年、1976年、1969年、1959年、1944年、1928年和1920年出版的CAN/CSA-C2单相和三相充液配电变压器（ONAN和LNAN型）。它是用国际单位制（公制）单位写的。1.范围1。1本标准规定了配电变压器的要求，但CSA C2涵盖的配电变压器除外。2，C227。3和C227。4.注:非电力公司按照本标准操作变压器时，可能会受到具有管辖权的电气检查机构的附加要求的约束。 1.2本标准适用于单相和三相60 Hz充液配电变压器，绝缘等级为34.5 kV或以下，额定电压为1000 kV。A或以下，适用于单相和3000 kV。A或以下为三相。1.3本标准包括额定电压，kV。A额定值、某些机械特性和试验程序。还包括以下性能特征:能效（符合CAN/CSA-C802.1）、温升、负载能力、声级和无线电影响电压（RIV）。1.4本标准也适用于自保护变压器，但保护设备除外。 1.5除其他CSA标准另有规定外，本标准不适用于自动、测试、干式、焊接、熔炉、整流器、网络、地铁型或专用变压器，也不适用于阶梯式电压调节器。1.6在CSA标准中，“应”用于表示要求，即用户有义务满足的条款，以符合标准；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一种选择或在标准范围内允许的选择；“can”用来表示可能性或能力。注释随附条款不包括要求或替代要求； 随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。

This is the first edition of CSA C2.1, Single-phase and three-phase liquid-filled distribution transformers.It supersedes previous editions of CAN/CSA-C2, Single-Phase and Three-phase Liquid-filled Distribution Transformers, Types ONAN and LNAN, published in 1991, 1982, 1976, 1969, 1959, 1944, 1928, and 1920.It is written in SI (metric) units.1 Scope1.1This Standard specifies the requirements for distribution transformers with the exception of those distribution transformers that are covered by CSA C2.2, C227.3, and C227.4. Note: The operation of transformers complying with this Standard by other than an electric utility may be subject to additional requirements by the electrical inspection authority having jurisdiction.1.2This Standard applies to single- and three-phase, 60 Hz, liquid-filled distribution transformers, insulation class 34.5 kV or less, rated at 1000 kV.A or below for single phase and at 3000 kV.A or below for three phase.1.3This Standard includes voltage ratings, kV.A ratings, certain mechanical characteristics, and test procedures. Also included are the following performance characteristics: energy efficiency (in accordance with CAN/CSA-C802.1), temperature rise, loading capabilities, sound level, and radio influence voltage (RIV).1.4This Standard also applies to self-protected transformers, with the exception of the protective equipment.1.5Except as specified by other CSA Standards, this Standard does not apply to auto-, testing, dry-type, welding, furnace, rectifier, network, subway-type, or special-purpose transformers, or to step-voltage regulators.1.6In CSA Standards, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; "may" is used to express an option or that which is permissible within the limits of the standard; and "can" is used to express possibility or capability.Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.